Mouthpiece



FIG. 1 is a top view of a mouthpiece in accordance with the present invention, wherein the bottom view is a mirror image thereof;

FIG. 2 is a right side view, wherein the left side view is a mirror image thereof;

FIG. 3 is a front view thereof;

FIG. 4 is an rear view thereof; and,

FIG. 5 is a perspective view thereof. 

The ornamental design for a mouthpiece, as shown. 